Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751866AbZFPQe3 (ORCPT ); Tue, 16 Jun 2009 12:34:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760090AbZFPQeP (ORCPT ); Tue, 16 Jun 2009 12:34:15 -0400 Received: from e23smtp09.au.ibm.com ([202.81.31.142]:53037 "EHLO e23smtp09.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760180AbZFPQeO (ORCPT ); Tue, 16 Jun 2009 12:34:14 -0400 Date: Tue, 16 Jun 2009 22:03:52 +0530 From: Gautham R Shenoy To: Nathan Lynch Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Balbir Singh , Rusty Russel , Paul E McKenney , Ingo Molnar , Venkatesh Pallipadi , Andrew Morton , Vaidyanathan Srinivasan , Dipankar Sarma , Shoahua Li Subject: Re: [RFD PATCH 2/4] cpu: sysfs interface for hotplugging bunch of CPUs. Message-ID: <20090616163352.GA6005@in.ibm.com> Reply-To: ego@in.ibm.com References: <20090616053431.30891.18682.stgit@sofia.in.ibm.com> <20090616053849.30891.17453.stgit@sofia.in.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1372 Lines: 36 On Tue, Jun 16, 2009 at 11:22:56AM -0500, Nathan Lynch wrote: > Gautham R Shenoy writes: > > echo 2,3 > /sys/devices/system/cpu/offline #Offlines CPUs 2 and 3 > > echo 4 > /sys/devices/sytem/cpu/offline #Offlines CPU 4 > > echo 2-4 > /sys/devices/system/cpu/online #Onlines CPU 2,3,4 > > > > This patch changes the permissions of these sysfs files from 0444 to 0644. > > It provides a dummy store function, which currently parses the input > > provided by the user and copies them to another debug cpumask structure, > > which can be accessed using the sysfs interfaces: > > /sys/devices/system/cpu/debug_offline > > and > > /sys/devices/system/cpu/debug_online > > > > Thus on performing a > > echo 2,3 > /sys/devices/system/cpu/offline > > the operation > > cat /sys/devices/system/cpu/debug_offline > > should yield > > 2-3 > > as the result. > > These debug_(on|off)line attributes aren't intended to be in the final > result, are they? They don't seem useful beyond the development phase > of this feature... No, they aren't intended to be in the final result. -- Thanks and Regards gautham -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/